Electric fuse



1. SCHNEIDER.

ELECTRIC FUSE.

APPLICATION FILED JULY25.1918.

1,315, 162. Patented Sept. 2, 1919.

WITNESSES 7 U m VEN r03 kjc/me/der JOHN SCHNEIDER, OF ELIZABETH, NEW JERSEY.

ELECTRIC FUSE.

Specification of Letters Patent.

Application filed July 25, 1918. Serial No. 246,746.

To all whom it may concern:

Be it known that I, JOHN SCHNEIDER, a citizen of the United, States, and a resident of Elizabeth, in the county of Union and State of New Jersey, have invented a new and Improved Electric Fuse, of which the following is a full, clear, and exact description.

This invention relates to a high tension electric fuse of that type in which one end'of the fuse wire is brought into an arc extinguishing-medium when the fuse blows The invention has for its general objects to improve and simplify the construction of fuses of this character so. as to be reliable and efiicient in use, comparatively simple and inexpensive to manufacture, and so designed that the arc will be positively extinguished.

A more specific object of the invention is the provision of a fuse having fuse wire associated with a mass of sand or other- Still another object is to provide a novel indicator to indicate the fact that the fuse has blown, this indicator being in the form of a cap on the end of the fuse and body, which cap is dislodged by the explosive forces of gases when the fuse blows, and is supported in position out of normal so as'to serve as an indicator of the blown condition of the fuse.

With such and other objects in View, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in I the following description and claims appended hereto.

In the accompanying drawing which illustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in both the views,

Figure 1 is a similar longitudinal section of the fusein its normal condition; and

Fig.2 is a similar view showing the fuse in blown condition.

erably, although not necessarily, made of glass. Within the ends of the'body 1 are short pieces of glass tubing 1-; and 5 which retain on their inner ends washers 6 and 7, respectively, there being confined between the washers a mass of sand or equivalent material which serves to extinguish the arc. Extending through the washers 6 and 7, the sand 8, the upper or tubular lining al and the cap 2, is a fuse wire 9 having a weakened portion 10 located within the chamber 11 Patented Sept. 2, 1919.

which is formed between the cap 2 and the washer 6. The lower end of the fuse wire 9 is connected at 12 with a helical spring 13 which is anchored at 14 in the cap 3, whereby there is a downward tension on the fuse wire. Extending through the cap 3 and connected. with the fuse wire is a flexible conductor 1'5 that forms one terminal of the fuse. The fuse wire 9 extends out of the upper cap 2 and is gripped by a spring member 16 which exerts a slight upward pull on the'fuse wire and also forms a terminal for the fuse.

- In operation, when the fuse blows the melting occurs at the .point 10, and the resuiting arc ignites the explosive material in the chamber 10, the force of which blows off the cap 2 and thereby carries the upper part of the fuse wire away from the lower part, which lower part is drawn downwardly by the spring 13. This separation of the parts of the fuse wire tends to disrupt the arc, but this effect is positively accomplished by the sand 8, which fills in over the upper end of the lower part of the fuse wire when the latten is drawn down, as shown in Fig. 2.

From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and method of operation will be readily understood by those skilled in the art to whlch the invention appertains, and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described my inventlon, I claim as new and desire to secure by Letters Patent:

1. A fuse comprising a body, a fusible element extending through the bod and having a reduced portion'that is a apted to fuse under excessive current, a mass 01' loose, non-conductive-material in the body at one side of the weakened part of the said element, and means placing the element under tension, whereby a part thereof moves into the material when the element blows, so as to extinguish the are. T

2. A fuse comprising a tubular body, membersin the body, a mass of sand held be* tween the members, a fuse wire extending through the sand and having a weakened portion outside the latter, means tending to pullfthe parts at opposite sides of the weakened portion away from each other,

whereby the part passing through the sand is moved when the element blows, so that the end of such part will be covered by sand which will extinguish the arc, and means connecting the fusible element in an electric circuit.

3. A fuse comprising a tubular body, a spring in one end of t e body, a fuse wire connected with the spring, said fuse wire having a weakened portion, means tow'hich the other end of the wire is fastened, amass of sand in the body at a point adjacent the weakened portion of the wire, whereby the sand will extinguish the are when the parts of the fuse elements separate.

4:. A. fuse comprising a tubular body, short sections of tubing fitted in the ends of the body, disks bearing against the said sections, a mass of sand held between the disks, a fusible wire extending through the sand and disks, caps on the ends of the body, one end of the fuse wire being connected with one of the caps, a spring connected with the other end of the fuse wire to draw a part thereof into the sand when the fuse wire blows, and means for connecting the fuse wire in an electric circuit.

JOHN SCHNEIDER. 

